APA
Mitton S., . (1977). The Cambridge encylopedia of astronomy. New York: Crown Publishers.
Chicago
Mitton Simon, . 1977. The Cambridge encylopedia of astronomy. New York: Crown Publishers.
Harvard
Mitton S., . (1977). The Cambridge encylopedia of astronomy. New York: Crown Publishers.
MLA
Mitton Simon, . The Cambridge encylopedia of astronomy. New York: Crown Publishers. 1977.